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389 or 421

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  • 389 or 421

    Can aynone tell me the easiest way to tell if I'm looking at a 389 or 421? My car has the 8-lug option and wondering if I'm lucky!

  • #2
    Engine code stamped on right front of block beside the front cover. Should be a 2 or 3 letter code.
    Attached Files
    '65 Goat

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    • #3
      Re: 389 or 421

      I was going to post that Don would be here shortly to help you....

      From a Remote Destination....
      - Christopher - They call me Devil Beard

      Hoarder of various 2nd gen Trans Ams and Firebirds/ 73-77

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